add syntax highlight for svn commit file

nanorc

@@ -67,6 +67,7 @@ include "~/.nano/sed.nanorc"
 include "~/.nano/sh.nanorc"
 include "~/.nano/sls.nanorc"
 include "~/.nano/sql.nanorc"
+include "~/.nano/svn.nanorc"
 include "~/.nano/swift.nanorc"
 include "~/.nano/systemd.nanorc"
 include "~/.nano/tcl.nanorc"

svn.nanorc

@@ -0,0 +1,14 @@
+syntax "svn-commit" "svn-commit(\.[[:digit:]]+)?\.tmp$"
+
+# commit message
+color yellow ".*"
+
+# ignore after line EDITOR_EOF_PREFIX (see svn/util.c)
+color brightblack "^--.+--$"
+
+# files changes
+color white       "^[ADM_](M|[[:space:]])[[:space:]](\+|[[:space:]])[[:space:]].*"
+color red         "^D[[:space:]]{4}"
+color green       "^[M_](M|[[:space:]])[[:space:]]{3}"
+color brightgreen "^A(M|[[:space:]])[[:space:]]{3}"
+color brightblue  "^A(M|[[:space:]])[[:space:]]\+[[:space:]]"