Fix: strip _any_ trailing line break character from the titles

Otherwise, when parsing *.md files with windows-style line breaks
(CR-LF), one of the line break characters would remain in the title,
thus breaking the markup for the table of content.

npryce#140

src/_adr_title

@@ -2,4 +2,4 @@
 set -e
 eval "$("$(dirname "$0")"/adr-config)"
 
-head -1 "$("$adr_bin_dir/_adr_file" "$1")" | cut -c 3-
+head -1 "$("$adr_bin_dir/_adr_file" "$1")" | cut -c 3- | tr -d '\r\n'