[gobject-introspection/flake8-updates] flake8 updates, fixes "make check.quality"

[Christoph Reiter <creiter src gnome org>]

commit fc1220ca86ba35451fdf9f812c44df49d21736fb
Author: Christoph Reiter <reiter christoph gmail com>
Date:   Sun Nov 4 13:32:29 2018 +0100

    flake8 updates, fixes "make check.quality"
    
    Disables the new "W504 line break after binary operator" warning.
    Fixes wrong escape sequences "W605 invalid escape sequence '\.'"

 .flake8            | 2 +-
 giscanner/utils.py | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/.flake8 b/.flake8
index cda7132a..527cabcd 100644
--- a/.flake8
+++ b/.flake8
@@ -1,4 +1,4 @@
 [flake8]
-ignore=E127,E402,E501,E731,E128,W503,E741
+ignore=E127,E402,E501,E731,E128,W503,E741,W504
 exclude=misc,subprojects
 builtins=DATADIR,GIRDIR
diff --git a/giscanner/utils.py b/giscanner/utils.py
index 67d6a17f..bdb90714 100644
--- a/giscanner/utils.py
+++ b/giscanner/utils.py
@@ -83,7 +83,7 @@ def to_underscores_noprefix(name):
     return name
 
 
-_libtool_pat = re.compile("dlname='([A-z0-9\.\-\+]+)'\n")
+_libtool_pat = re.compile("dlname='([A-z0-9\\.\\-\\+]+)'\n")
 
 
 def _extract_dlname_field(la_file):