tc-text-*: Fixes

.scripts/tc-text-2utf8

@@ -2,7 +2,7 @@
 
 if [ $# -eq 0 ] || [ "$1" = "-h" ]; then
 	cat<<EOF
-Usage: ${1##*/} FOLDERS
+Usage: ${0##*/} FOLDERS
 
 Convert all 'bad' encoding to UTF-8/LF.
 

.scripts/tc-text-scan

@@ -2,17 +2,18 @@
 
 if [ $# -eq 0 ] || [ "$1" = "-h" ]; then
 	cat<<EOF
-Usage: ${1##*/} FOLDERS
+Usage: ${0##*/} FOLDERS
 
-Check for files containing common mispelling, like "`" and "´" instead of "'",
-or "oe" instead of "œ".
+Check for files containing common mispelling:
 
+- "\`" and "´" instead of "'",
+- "oe" instead of "œ".
 EOF
 fi
 
 if ! command -v recode >/dev/null 2>&1; then
-	echo "recode needed."
-	exit
+	echo >&2 "recode needed."
+	exit 1
 fi
 
 for i ; do