editors: only extend line width to 119 for C and XML files

For all other files leave the line width at 79 as before. This is a good idea
since we generally don't want text files such as catalog files, unit files or
README/NEWS files to be line-broken at 119 since they are regularly browsed on
text terminals.

While we are at it, also add a couple of comments to the various files.

(Note that .editorconfig doesn't carry line-width information, simply because
the specification doesn't know the concept.)

1 files changed, 12 insertions, 3 deletions

diff --git a/.dir-locals.el b/.dir-locals.el
index 9388bd66c2..3e1b2d76c0 100644
--- a/.dir-locals.el
+++ b/.dir-locals.el
@@ -2,13 +2,22 @@
 ; A list of (major-mode . ((var1 . value1) (var2 . value2)))
 ; Mode can be nil, which gives default values.
 
+; Note that we set a line width of 119 for .c and XML files, but for everything
+; else (such as journal catalog files, unit files, README files) we stick to a
+; more conservative 79 characters.
+
+; NOTE: If you update this file make sure to update .vimrc and .editorconfig,
+; too.
+
 ((nil . ((indent-tabs-mode . nil)
          (tab-width . 8)
-         (fill-column . 119)))
- (c-mode . ((c-basic-offset . 8)
+         (fill-column . 79)))
+ (c-mode . ((fill-column . 119)
+            (c-basic-offset . 8)
             (eval . (c-set-offset 'substatement-open 0))
             (eval . (c-set-offset 'statement-case-open 0))
             (eval . (c-set-offset 'case-label 0))
             (eval . (c-set-offset 'arglist-intro '++))
             (eval . (c-set-offset 'arglist-close 0))))
- (nxml-mode . ((nxml-child-indent . 2))))
+ (nxml-mode . ((nxml-child-indent . 2)
+               (fill-column . 119))))