Mass replace '' -> None.

To make use of the new 'errors' argument.

'' was used in the original Perl tables both to mean an unknown replacement and
an intentional replacement with and empty string. Here I only replace it in
ranges I've added later where I'm reasonably sure that '' means unknown
replacement.

4 files changed, 395 insertions, 395 deletions

diff --git a/unidecode/x1d4.py b/unidecode/x1d4.py
index 5379593..7d23fd4 100644
--- a/unidecode/x1d4.py
+++ b/unidecode/x1d4.py
@@ -84,7 +84,7 @@ data = (
 'e',    # 0x52
 'f',    # 0x53
 'g',    # 0x54
-'',    # 0x55
+None,    # 0x55
 'i',    # 0x56
 'j',    # 0x57
 'k',    # 0x58
@@ -156,23 +156,23 @@ data = (
 'y',    # 0x9a
 'z',    # 0x9b
 'A',    # 0x9c
-'',    # 0x9d
+None,    # 0x9d
 'C',    # 0x9e
 'D',    # 0x9f
-'',    # 0xa0
-'',    # 0xa1
+None,    # 0xa0
+None,    # 0xa1
 'G',    # 0xa2
-'',    # 0xa3
-'',    # 0xa4
+None,    # 0xa3
+None,    # 0xa4
 'J',    # 0xa5
 'K',    # 0xa6
-'',    # 0xa7
-'',    # 0xa8
+None,    # 0xa7
+None,    # 0xa8
 'N',    # 0xa9
 'O',    # 0xaa
 'P',    # 0xab
 'Q',    # 0xac
-'',    # 0xad
+None,    # 0xad
 'S',    # 0xae
 'T',    # 0xaf
 'U',    # 0xb0
@@ -185,9 +185,9 @@ data = (
 'b',    # 0xb7
 'c',    # 0xb8
 'd',    # 0xb9
-'',    # 0xba
+None,    # 0xba
 'f',    # 0xbb
-'',    # 0xbc
+None,    # 0xbc
 'h',    # 0xbd
 'i',    # 0xbe
 'j',    # 0xbf
@@ -195,7 +195,7 @@ data = (
 'l',    # 0xc1
 'm',    # 0xc2
 'n',    # 0xc3
-'',    # 0xc4
+None,    # 0xc4
 'p',    # 0xc5
 'q',    # 0xc6
 'r',    # 0xc7
diff --git a/unidecode/x1d6.py b/unidecode/x1d6.py
index c06a855..2be1a7f 100644
--- a/unidecode/x1d6.py
+++ b/unidecode/x1d6.py
@@ -165,8 +165,8 @@ data = (
 'z',    # 0xa3
 'i',    # 0xa4
 'j',    # 0xa5
-'',    # 0xa6
-'',    # 0xa7
+None,    # 0xa6
+None,    # 0xa7
 'Alpha',    # 0xa8
 'Beta',    # 0xa9
 'Gamma',    # 0xaa
@@ -218,41 +218,41 @@ data = (
 'chi',    # 0xd8
 'psi',    # 0xd9
 'omega',    # 0xda
-'',    # 0xdb
-'',    # 0xdc
-'',    # 0xdd
-'',    # 0xde
-'',    # 0xdf
-'',    # 0xe0
-'',    # 0xe1
-'',    # 0xe2
-'',    # 0xe3
-'',    # 0xe4
-'',    # 0xe5
-'',    # 0xe6
-'',    # 0xe7
-'',    # 0xe8
-'',    # 0xe9
-'',    # 0xea
-'',    # 0xeb
-'',    # 0xec
-'',    # 0xed
-'',    # 0xee
-'',    # 0xef
-'',    # 0xf0
-'',    # 0xf1
-'',    # 0xf2
-'',    # 0xf3
-'',    # 0xf4
-'',    # 0xf5
-'',    # 0xf6
-'',    # 0xf7
-'',    # 0xf8
-'',    # 0xf9
-'',    # 0xfa
-'',    # 0xfb
-'',    # 0xfc
-'',    # 0xfd
-'',    # 0xfe
-'',    # 0xff
+None,    # 0xdb
+None,    # 0xdc
+None,    # 0xdd
+None,    # 0xde
+None,    # 0xdf
+None,    # 0xe0
+None,    # 0xe1
+None,    # 0xe2
+None,    # 0xe3
+None,    # 0xe4
+None,    # 0xe5
+None,    # 0xe6
+None,    # 0xe7
+None,    # 0xe8
+None,    # 0xe9
+None,    # 0xea
+None,    # 0xeb
+None,    # 0xec
+None,    # 0xed
+None,    # 0xee
+None,    # 0xef
+None,    # 0xf0
+None,    # 0xf1
+None,    # 0xf2
+None,    # 0xf3
+None,    # 0xf4
+None,    # 0xf5
+None,    # 0xf6
+None,    # 0xf7
+None,    # 0xf8
+None,    # 0xf9
+None,    # 0xfa
+None,    # 0xfb
+None,    # 0xfc
+None,    # 0xfd
+None,    # 0xfe
+None,    # 0xff
 )
diff --git a/unidecode/x1d7.py b/unidecode/x1d7.py
index 6943bf4..46242ec 100644
--- a/unidecode/x1d7.py
+++ b/unidecode/x1d7.py
@@ -1,210 +1,210 @@
 data = (
-'',    # 0x00
-'',    # 0x01
-'',    # 0x02
-'',    # 0x03
-'',    # 0x04
-'',    # 0x05
-'',    # 0x06
-'',    # 0x07
-'',    # 0x08
-'',    # 0x09
-'',    # 0x0a
-'',    # 0x0b
-'',    # 0x0c
-'',    # 0x0d
-'',    # 0x0e
-'',    # 0x0f
-'',    # 0x10
-'',    # 0x11
-'',    # 0x12
-'',    # 0x13
-'',    # 0x14
-'',    # 0x15
-'',    # 0x16
-'',    # 0x17
-'',    # 0x18
-'',    # 0x19
-'',    # 0x1a
-'',    # 0x1b
-'',    # 0x1c
-'',    # 0x1d
-'',    # 0x1e
-'',    # 0x1f
-'',    # 0x20
-'',    # 0x21
-'',    # 0x22
-'',    # 0x23
-'',    # 0x24
-'',    # 0x25
-'',    # 0x26
-'',    # 0x27
-'',    # 0x28
-'',    # 0x29
-'',    # 0x2a
-'',    # 0x2b
-'',    # 0x2c
-'',    # 0x2d
-'',    # 0x2e
-'',    # 0x2f
-'',    # 0x30
-'',    # 0x31
-'',    # 0x32
-'',    # 0x33
-'',    # 0x34
-'',    # 0x35
-'',    # 0x36
-'',    # 0x37
-'',    # 0x38
-'',    # 0x39
-'',    # 0x3a
-'',    # 0x3b
-'',    # 0x3c
-'',    # 0x3d
-'',    # 0x3e
-'',    # 0x3f
-'',    # 0x40
-'',    # 0x41
-'',    # 0x42
-'',    # 0x43
-'',    # 0x44
-'',    # 0x45
-'',    # 0x46
-'',    # 0x47
-'',    # 0x48
-'',    # 0x49
-'',    # 0x4a
-'',    # 0x4b
-'',    # 0x4c
-'',    # 0x4d
-'',    # 0x4e
-'',    # 0x4f
-'',    # 0x50
-'',    # 0x51
-'',    # 0x52
-'',    # 0x53
-'',    # 0x54
-'',    # 0x55
-'',    # 0x56
-'',    # 0x57
-'',    # 0x58
-'',    # 0x59
-'',    # 0x5a
-'',    # 0x5b
-'',    # 0x5c
-'',    # 0x5d
-'',    # 0x5e
-'',    # 0x5f
-'',    # 0x60
-'',    # 0x61
-'',    # 0x62
-'',    # 0x63
-'',    # 0x64
-'',    # 0x65
-'',    # 0x66
-'',    # 0x67
-'',    # 0x68
-'',    # 0x69
-'',    # 0x6a
-'',    # 0x6b
-'',    # 0x6c
-'',    # 0x6d
-'',    # 0x6e
-'',    # 0x6f
-'',    # 0x70
-'',    # 0x71
-'',    # 0x72
-'',    # 0x73
-'',    # 0x74
-'',    # 0x75
-'',    # 0x76
-'',    # 0x77
-'',    # 0x78
-'',    # 0x79
-'',    # 0x7a
-'',    # 0x7b
-'',    # 0x7c
-'',    # 0x7d
-'',    # 0x7e
-'',    # 0x7f
-'',    # 0x80
-'',    # 0x81
-'',    # 0x82
-'',    # 0x83
-'',    # 0x84
-'',    # 0x85
-'',    # 0x86
-'',    # 0x87
-'',    # 0x88
-'',    # 0x89
-'',    # 0x8a
-'',    # 0x8b
-'',    # 0x8c
-'',    # 0x8d
-'',    # 0x8e
-'',    # 0x8f
-'',    # 0x90
-'',    # 0x91
-'',    # 0x92
-'',    # 0x93
-'',    # 0x94
-'',    # 0x95
-'',    # 0x96
-'',    # 0x97
-'',    # 0x98
-'',    # 0x99
-'',    # 0x9a
-'',    # 0x9b
-'',    # 0x9c
-'',    # 0x9d
-'',    # 0x9e
-'',    # 0x9f
-'',    # 0xa0
-'',    # 0xa1
-'',    # 0xa2
-'',    # 0xa3
-'',    # 0xa4
-'',    # 0xa5
-'',    # 0xa6
-'',    # 0xa7
-'',    # 0xa8
-'',    # 0xa9
-'',    # 0xaa
-'',    # 0xab
-'',    # 0xac
-'',    # 0xad
-'',    # 0xae
-'',    # 0xaf
-'',    # 0xb0
-'',    # 0xb1
-'',    # 0xb2
-'',    # 0xb3
-'',    # 0xb4
-'',    # 0xb5
-'',    # 0xb6
-'',    # 0xb7
-'',    # 0xb8
-'',    # 0xb9
-'',    # 0xba
-'',    # 0xbb
-'',    # 0xbc
-'',    # 0xbd
-'',    # 0xbe
-'',    # 0xbf
-'',    # 0xc0
-'',    # 0xc1
-'',    # 0xc2
-'',    # 0xc3
-'',    # 0xc4
-'',    # 0xc5
-'',    # 0xc6
-'',    # 0xc7
-'',    # 0xc8
-'',    # 0xc9
-'',    # 0xca
-'',    # 0xcb
-'',    # 0xcc
-'',    # 0xcd
+None,    # 0x00
+None,    # 0x01
+None,    # 0x02
+None,    # 0x03
+None,    # 0x04
+None,    # 0x05
+None,    # 0x06
+None,    # 0x07
+None,    # 0x08
+None,    # 0x09
+None,    # 0x0a
+None,    # 0x0b
+None,    # 0x0c
+None,    # 0x0d
+None,    # 0x0e
+None,    # 0x0f
+None,    # 0x10
+None,    # 0x11
+None,    # 0x12
+None,    # 0x13
+None,    # 0x14
+None,    # 0x15
+None,    # 0x16
+None,    # 0x17
+None,    # 0x18
+None,    # 0x19
+None,    # 0x1a
+None,    # 0x1b
+None,    # 0x1c
+None,    # 0x1d
+None,    # 0x1e
+None,    # 0x1f
+None,    # 0x20
+None,    # 0x21
+None,    # 0x22
+None,    # 0x23
+None,    # 0x24
+None,    # 0x25
+None,    # 0x26
+None,    # 0x27
+None,    # 0x28
+None,    # 0x29
+None,    # 0x2a
+None,    # 0x2b
+None,    # 0x2c
+None,    # 0x2d
+None,    # 0x2e
+None,    # 0x2f
+None,    # 0x30
+None,    # 0x31
+None,    # 0x32
+None,    # 0x33
+None,    # 0x34
+None,    # 0x35
+None,    # 0x36
+None,    # 0x37
+None,    # 0x38
+None,    # 0x39
+None,    # 0x3a
+None,    # 0x3b
+None,    # 0x3c
+None,    # 0x3d
+None,    # 0x3e
+None,    # 0x3f
+None,    # 0x40
+None,    # 0x41
+None,    # 0x42
+None,    # 0x43
+None,    # 0x44
+None,    # 0x45
+None,    # 0x46
+None,    # 0x47
+None,    # 0x48
+None,    # 0x49
+None,    # 0x4a
+None,    # 0x4b
+None,    # 0x4c
+None,    # 0x4d
+None,    # 0x4e
+None,    # 0x4f
+None,    # 0x50
+None,    # 0x51
+None,    # 0x52
+None,    # 0x53
+None,    # 0x54
+None,    # 0x55
+None,    # 0x56
+None,    # 0x57
+None,    # 0x58
+None,    # 0x59
+None,    # 0x5a
+None,    # 0x5b
+None,    # 0x5c
+None,    # 0x5d
+None,    # 0x5e
+None,    # 0x5f
+None,    # 0x60
+None,    # 0x61
+None,    # 0x62
+None,    # 0x63
+None,    # 0x64
+None,    # 0x65
+None,    # 0x66
+None,    # 0x67
+None,    # 0x68
+None,    # 0x69
+None,    # 0x6a
+None,    # 0x6b
+None,    # 0x6c
+None,    # 0x6d
+None,    # 0x6e
+None,    # 0x6f
+None,    # 0x70
+None,    # 0x71
+None,    # 0x72
+None,    # 0x73
+None,    # 0x74
+None,    # 0x75
+None,    # 0x76
+None,    # 0x77
+None,    # 0x78
+None,    # 0x79
+None,    # 0x7a
+None,    # 0x7b
+None,    # 0x7c
+None,    # 0x7d
+None,    # 0x7e
+None,    # 0x7f
+None,    # 0x80
+None,    # 0x81
+None,    # 0x82
+None,    # 0x83
+None,    # 0x84
+None,    # 0x85
+None,    # 0x86
+None,    # 0x87
+None,    # 0x88
+None,    # 0x89
+None,    # 0x8a
+None,    # 0x8b
+None,    # 0x8c
+None,    # 0x8d
+None,    # 0x8e
+None,    # 0x8f
+None,    # 0x90
+None,    # 0x91
+None,    # 0x92
+None,    # 0x93
+None,    # 0x94
+None,    # 0x95
+None,    # 0x96
+None,    # 0x97
+None,    # 0x98
+None,    # 0x99
+None,    # 0x9a
+None,    # 0x9b
+None,    # 0x9c
+None,    # 0x9d
+None,    # 0x9e
+None,    # 0x9f
+None,    # 0xa0
+None,    # 0xa1
+None,    # 0xa2
+None,    # 0xa3
+None,    # 0xa4
+None,    # 0xa5
+None,    # 0xa6
+None,    # 0xa7
+None,    # 0xa8
+None,    # 0xa9
+None,    # 0xaa
+None,    # 0xab
+None,    # 0xac
+None,    # 0xad
+None,    # 0xae
+None,    # 0xaf
+None,    # 0xb0
+None,    # 0xb1
+None,    # 0xb2
+None,    # 0xb3
+None,    # 0xb4
+None,    # 0xb5
+None,    # 0xb6
+None,    # 0xb7
+None,    # 0xb8
+None,    # 0xb9
+None,    # 0xba
+None,    # 0xbb
+None,    # 0xbc
+None,    # 0xbd
+None,    # 0xbe
+None,    # 0xbf
+None,    # 0xc0
+None,    # 0xc1
+None,    # 0xc2
+None,    # 0xc3
+None,    # 0xc4
+None,    # 0xc5
+None,    # 0xc6
+None,    # 0xc7
+None,    # 0xc8
+None,    # 0xc9
+None,    # 0xca
+None,    # 0xcb
+None,    # 0xcc
+None,    # 0xcd
 '0',    # 0xce
 '1',    # 0xcf
 '2',    # 0xd0
diff --git a/unidecode/x1f1.py b/unidecode/x1f1.py
index 4bc82b5..888f274 100644
--- a/unidecode/x1f1.py
+++ b/unidecode/x1f1.py
@@ -10,11 +10,11 @@ data = (
 '7,',    # 0x08
 '8,',    # 0x09
 '9,',    # 0x0a
-'',    # 0x0b
-'',    # 0x0c
-'',    # 0x0d
-'',    # 0x0e
-'',    # 0x0f
+None,    # 0x0b
+None,    # 0x0c
+None,    # 0x0d
+None,    # 0x0e
+None,    # 0x0f
 '(A)',    # 0x10
 '(B)',    # 0x11
 '(C)',    # 0x12
@@ -44,9 +44,9 @@ data = (
 '<S>',    # 0x2a
 '(C)',    # 0x2b
 '(R)',    # 0x2c
-'',    # 0x2d
-'',    # 0x2e
-'',    # 0x2f
+None,    # 0x2d
+None,    # 0x2e
+None,    # 0x2f
 '[A]',    # 0x30
 '[B]',    # 0x31
 '[C]',    # 0x32
@@ -73,12 +73,12 @@ data = (
 '[X]',    # 0x47
 '[Y]',    # 0x48
 '[Z]',    # 0x49
-'',    # 0x4a
-'',    # 0x4b
-'',    # 0x4c
-'',    # 0x4d
-'',    # 0x4e
-'',    # 0x4f
+None,    # 0x4a
+None,    # 0x4b
+None,    # 0x4c
+None,    # 0x4d
+None,    # 0x4e
+None,    # 0x4f
 '(A)',    # 0x50
 '(B)',    # 0x51
 '(C)',    # 0x52
@@ -105,12 +105,12 @@ data = (
 '(X)',    # 0x67
 '(Y)',    # 0x68
 '(Z)',    # 0x69
-'',    # 0x6a
-'',    # 0x6b
-'',    # 0x6c
-'',    # 0x6d
-'',    # 0x6e
-'',    # 0x6f
+None,    # 0x6a
+None,    # 0x6b
+None,    # 0x6c
+None,    # 0x6d
+None,    # 0x6e
+None,    # 0x6f
 '[A]',    # 0x70
 '[B]',    # 0x71
 '[C]',    # 0x72
@@ -137,122 +137,122 @@ data = (
 '[X]',    # 0x87
 '[Y]',    # 0x88
 '[Z]',    # 0x89
-'',    # 0x8a
-'',    # 0x8b
-'',    # 0x8c
-'',    # 0x8d
-'',    # 0x8e
-'',    # 0x8f
-'',    # 0x90
-'',    # 0x91
-'',    # 0x92
-'',    # 0x93
-'',    # 0x94
-'',    # 0x95
-'',    # 0x96
-'',    # 0x97
-'',    # 0x98
-'',    # 0x99
-'',    # 0x9a
-'',    # 0x9b
-'',    # 0x9c
-'',    # 0x9d
-'',    # 0x9e
-'',    # 0x9f
-'',    # 0xa0
-'',    # 0xa1
-'',    # 0xa2
-'',    # 0xa3
-'',    # 0xa4
-'',    # 0xa5
-'',    # 0xa6
-'',    # 0xa7
-'',    # 0xa8
-'',    # 0xa9
-'',    # 0xaa
-'',    # 0xab
-'',    # 0xac
-'',    # 0xad
-'',    # 0xae
-'',    # 0xaf
-'',    # 0xb0
-'',    # 0xb1
-'',    # 0xb2
-'',    # 0xb3
-'',    # 0xb4
-'',    # 0xb5
-'',    # 0xb6
-'',    # 0xb7
-'',    # 0xb8
-'',    # 0xb9
-'',    # 0xba
-'',    # 0xbb
-'',    # 0xbc
-'',    # 0xbd
-'',    # 0xbe
-'',    # 0xbf
-'',    # 0xc0
-'',    # 0xc1
-'',    # 0xc2
-'',    # 0xc3
-'',    # 0xc4
-'',    # 0xc5
-'',    # 0xc6
-'',    # 0xc7
-'',    # 0xc8
-'',    # 0xc9
-'',    # 0xca
-'',    # 0xcb
-'',    # 0xcc
-'',    # 0xcd
-'',    # 0xce
-'',    # 0xcf
-'',    # 0xd0
-'',    # 0xd1
-'',    # 0xd2
-'',    # 0xd3
-'',    # 0xd4
-'',    # 0xd5
-'',    # 0xd6
-'',    # 0xd7
-'',    # 0xd8
-'',    # 0xd9
-'',    # 0xda
-'',    # 0xdb
-'',    # 0xdc
-'',    # 0xdd
-'',    # 0xde
-'',    # 0xdf
-'',    # 0xe0
-'',    # 0xe1
-'',    # 0xe2
-'',    # 0xe3
-'',    # 0xe4
-'',    # 0xe5
-'',    # 0xe6
-'',    # 0xe7
-'',    # 0xe8
-'',    # 0xe9
-'',    # 0xea
-'',    # 0xeb
-'',    # 0xec
-'',    # 0xed
-'',    # 0xee
-'',    # 0xef
-'',    # 0xf0
-'',    # 0xf1
-'',    # 0xf2
-'',    # 0xf3
-'',    # 0xf4
-'',    # 0xf5
-'',    # 0xf6
-'',    # 0xf7
-'',    # 0xf8
-'',    # 0xf9
-'',    # 0xfa
-'',    # 0xfb
-'',    # 0xfc
-'',    # 0xfd
-'',    # 0xfe
-'',    # 0xff
+None,    # 0x8a
+None,    # 0x8b
+None,    # 0x8c
+None,    # 0x8d
+None,    # 0x8e
+None,    # 0x8f
+None,    # 0x90
+None,    # 0x91
+None,    # 0x92
+None,    # 0x93
+None,    # 0x94
+None,    # 0x95
+None,    # 0x96
+None,    # 0x97
+None,    # 0x98
+None,    # 0x99
+None,    # 0x9a
+None,    # 0x9b
+None,    # 0x9c
+None,    # 0x9d
+None,    # 0x9e
+None,    # 0x9f
+None,    # 0xa0
+None,    # 0xa1
+None,    # 0xa2
+None,    # 0xa3
+None,    # 0xa4
+None,    # 0xa5
+None,    # 0xa6
+None,    # 0xa7
+None,    # 0xa8
+None,    # 0xa9
+None,    # 0xaa
+None,    # 0xab
+None,    # 0xac
+None,    # 0xad
+None,    # 0xae
+None,    # 0xaf
+None,    # 0xb0
+None,    # 0xb1
+None,    # 0xb2
+None,    # 0xb3
+None,    # 0xb4
+None,    # 0xb5
+None,    # 0xb6
+None,    # 0xb7
+None,    # 0xb8
+None,    # 0xb9
+None,    # 0xba
+None,    # 0xbb
+None,    # 0xbc
+None,    # 0xbd
+None,    # 0xbe
+None,    # 0xbf
+None,    # 0xc0
+None,    # 0xc1
+None,    # 0xc2
+None,    # 0xc3
+None,    # 0xc4
+None,    # 0xc5
+None,    # 0xc6
+None,    # 0xc7
+None,    # 0xc8
+None,    # 0xc9
+None,    # 0xca
+None,    # 0xcb
+None,    # 0xcc
+None,    # 0xcd
+None,    # 0xce
+None,    # 0xcf
+None,    # 0xd0
+None,    # 0xd1
+None,    # 0xd2
+None,    # 0xd3
+None,    # 0xd4
+None,    # 0xd5
+None,    # 0xd6
+None,    # 0xd7
+None,    # 0xd8
+None,    # 0xd9
+None,    # 0xda
+None,    # 0xdb
+None,    # 0xdc
+None,    # 0xdd
+None,    # 0xde
+None,    # 0xdf
+None,    # 0xe0
+None,    # 0xe1
+None,    # 0xe2
+None,    # 0xe3
+None,    # 0xe4
+None,    # 0xe5
+None,    # 0xe6
+None,    # 0xe7
+None,    # 0xe8
+None,    # 0xe9
+None,    # 0xea
+None,    # 0xeb
+None,    # 0xec
+None,    # 0xed
+None,    # 0xee
+None,    # 0xef
+None,    # 0xf0
+None,    # 0xf1
+None,    # 0xf2
+None,    # 0xf3
+None,    # 0xf4
+None,    # 0xf5
+None,    # 0xf6
+None,    # 0xf7
+None,    # 0xf8
+None,    # 0xf9
+None,    # 0xfa
+None,    # 0xfb
+None,    # 0xfc
+None,    # 0xfd
+None,    # 0xfe
+None,    # 0xff
 )