[gtksourceview] python.lang: recognize escape sequences in raw strings

[Sébastien Wilmet <swilmet src gnome org>]

commit 3024375f700064295e594cf3f8c4ad7a209d1e4c
Author: Роман Донченко <dpb corrigendum ru>
Date:   Thu Nov 16 01:53:54 2017 +0300

    python.lang: recognize escape sequences in raw strings
    
    Raw strings can still contain escape sequences. In particular, the quote
    character can be escaped. However, the escape sequences are interpreted
    literally (i.e., as a backslash followed by other characters).
    Illustrate that by suppressing the style of the escaped-char context.
    
    Line continuations are interpreted literally inside raw strings too (as
    a backslash and a newline), so suppress the style for those, as well.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=784673

 data/language-specs/python.lang   |    8 ++++++--
 tests/syntax-highlighting/file.py |    5 +++++
 2 files changed, 11 insertions(+), 2 deletions(-)
---
diff --git a/data/language-specs/python.lang b/data/language-specs/python.lang
index 21a811c..ea20715 100644
--- a/data/language-specs/python.lang
+++ b/data/language-specs/python.lang
@@ -137,6 +137,7 @@
       <end>"""</end>
       <include>
         <context ref="format"/>
+        <context ref="escaped-char" ignore-style="true"/>
       </include>
     </context>
 
@@ -145,6 +146,7 @@
       <end>'''</end>
       <include>
         <context ref="format"/>
+        <context ref="escaped-char" ignore-style="true"/>
       </include>
     </context>
 
@@ -153,7 +155,8 @@
       <end>"</end>
       <include>
         <context ref="format"/>
-        <context ref="def:line-continue"/>
+        <context ref="escaped-char" ignore-style="true"/>
+        <context ref="def:line-continue" ignore-style="true"/>
       </include>
     </context>
 
@@ -162,7 +165,8 @@
       <end>'</end>
       <include>
         <context ref="format"/>
-        <context ref="def:line-continue"/>
+        <context ref="escaped-char" ignore-style="true"/>
+        <context ref="def:line-continue" ignore-style="true"/>
       </include>
     </context>
 
diff --git a/tests/syntax-highlighting/file.py b/tests/syntax-highlighting/file.py
index faaa113..819875d 100644
--- a/tests/syntax-highlighting/file.py
+++ b/tests/syntax-highlighting/file.py
@@ -6,4 +6,9 @@ class Hello(object):
     def hello(self):
         print >> sys.stderr, "Hi there!"
     None, True, False
+    r'raw \' \
+        string'
+    r"""raw multiline \"""
+        string"""
+
 Hello().hello()