Make W605 point to the invalid sequence

Instead of having W605 point to the beginning of the string literal,
make it point to the precise line and column of the invalid escape sequence.

This is more helpful when you have multiline string literals.

1 files changed, 10 insertions, 3 deletions

diff --git a/testsuite/W60.py b/testsuite/W60.py
index 1b03099..4cbaad9 100644
--- a/testsuite/W60.py
+++ b/testsuite/W60.py
@@ -13,16 +13,23 @@ if x <> 0:
     x = 0
 #: W604
 val = `1 + 2`
-#: W605:1:9
+#: W605:1:10
 regex = '\.png$'
-#: W605:1:9
+#: W605:2:1
 regex = '''
 \.png$
 '''
-#: W605:2:5
+#: W605:2:6
 f(
     '\_'
 )
+#: W605:4:6
+"""
+multi-line
+literal
+with \_ somewhere
+in the middle
+"""
 #: Okay
 regex = r'\.png$'
 regex = '\\.png$'