1 files changed, 32 insertions, 32 deletions
diff --git a/pygments/lexers/rdf.py b/pygments/lexers/rdf.py
index 8bbd4b0c..136850bd 100644
--- a/pygments/lexers/rdf.py
+++ b/pygments/lexers/rdf.py
@@ -31,27 +31,27 @@ class SparqlLexer(RegexLexer):
 
     # character group definitions ::
 
-    PN_CHARS_BASE_GRP = (u'a-zA-Z'
-                         u'\u00c0-\u00d6'
-                         u'\u00d8-\u00f6'
-                         u'\u00f8-\u02ff'
-                         u'\u0370-\u037d'
-                         u'\u037f-\u1fff'
-                         u'\u200c-\u200d'
-                         u'\u2070-\u218f'
-                         u'\u2c00-\u2fef'
-                         u'\u3001-\ud7ff'
-                         u'\uf900-\ufdcf'
-                         u'\ufdf0-\ufffd')
+    PN_CHARS_BASE_GRP = ('a-zA-Z'
+                         '\u00c0-\u00d6'
+                         '\u00d8-\u00f6'
+                         '\u00f8-\u02ff'
+                         '\u0370-\u037d'
+                         '\u037f-\u1fff'
+                         '\u200c-\u200d'
+                         '\u2070-\u218f'
+                         '\u2c00-\u2fef'
+                         '\u3001-\ud7ff'
+                         '\uf900-\ufdcf'
+                         '\ufdf0-\ufffd')
 
     PN_CHARS_U_GRP = (PN_CHARS_BASE_GRP + '_')
 
     PN_CHARS_GRP = (PN_CHARS_U_GRP +
                     r'\-' +
                     r'0-9' +
-                    u'\u00b7' +
-                    u'\u0300-\u036f' +
-                    u'\u203f-\u2040')
+                    '\u00b7' +
+                    '\u0300-\u036f' +
+                    '\u203f-\u2040')
 
     HEX_GRP = '0-9A-Fa-f'
 
@@ -76,8 +76,8 @@ class SparqlLexer(RegexLexer):
 
     PN_PREFIX = PN_CHARS_BASE + '(?:[' + PN_CHARS_GRP + '.]*' + PN_CHARS + ')?'
 
-    VARNAME = u'[0-9' + PN_CHARS_U_GRP + '][' + PN_CHARS_U_GRP + \
-              u'0-9\u00b7\u0300-\u036f\u203f-\u2040]*'
+    VARNAME = '[0-9' + PN_CHARS_U_GRP + '][' + PN_CHARS_U_GRP + \
+              '0-9\u00b7\u0300-\u036f\u203f-\u2040]*'
 
     PERCENT = '%' + HEX + HEX
 
@@ -288,27 +288,27 @@ class ShExCLexer(RegexLexer):
 
     # character group definitions ::
 
-    PN_CHARS_BASE_GRP = (u'a-zA-Z'
-                         u'\u00c0-\u00d6'
-                         u'\u00d8-\u00f6'
-                         u'\u00f8-\u02ff'
-                         u'\u0370-\u037d'
-                         u'\u037f-\u1fff'
-                         u'\u200c-\u200d'
-                         u'\u2070-\u218f'
-                         u'\u2c00-\u2fef'
-                         u'\u3001-\ud7ff'
-                         u'\uf900-\ufdcf'
-                         u'\ufdf0-\ufffd')
+    PN_CHARS_BASE_GRP = ('a-zA-Z'
+                         '\u00c0-\u00d6'
+                         '\u00d8-\u00f6'
+                         '\u00f8-\u02ff'
+                         '\u0370-\u037d'
+                         '\u037f-\u1fff'
+                         '\u200c-\u200d'
+                         '\u2070-\u218f'
+                         '\u2c00-\u2fef'
+                         '\u3001-\ud7ff'
+                         '\uf900-\ufdcf'
+                         '\ufdf0-\ufffd')
 
     PN_CHARS_U_GRP = (PN_CHARS_BASE_GRP + '_')
 
     PN_CHARS_GRP = (PN_CHARS_U_GRP +
                     r'\-' +
                     r'0-9' +
-                    u'\u00b7' +
-                    u'\u0300-\u036f' +
-                    u'\u203f-\u2040')
+                    '\u00b7' +
+                    '\u0300-\u036f' +
+                    '\u203f-\u2040')
 
     HEX_GRP = '0-9A-Fa-f'