[patch] Highlight %lf in C code in mcedit

[safinaskar]

"%f" is highlighted in C code in mcedit, but "%lf" is not. See the following table:

	C89	C99
scanf	%lf is supported	%lf is supported
printf	%lf is not supported	%lf is supported

As you can see, %lf is supported in most cases, so, please, highlight it.

# mc -V
GNU Midnight Commander 4.8.13
Built with GLib 2.40.0
Using the S-Lang library with terminfo database
With builtin Editor
With subshell support as default
With support for background operations
With mouse support on xterm and Linux console
With support for X11 events
With internationalization support
With multiple codepages support
Virtual File Systems: cpiofs, tarfs, sfs, extfs, ext2undelfs, ftpfs, sftpfs, fish
Data types: char: 8; int: 32; long: 64; void *: 64; size_t: 64; off_t: 64;
# mc --configure-options

'--build=x86_64-linux-gnu' '--prefix=/usr' '--includedir=${prefix}/include' '--mandir=${prefix}/share/man' '--infodir=${prefix}/share/info' '--sysconfdir=/etc' '--localstatedir=/var' '--libdir=${prefix}/lib/x86_64-linux-gnu' '--libexecdir=${prefix}/lib/x86_64-linux-gnu' '--disable-maintainer-mode' '--disable-dependency-tracking' 'AWK=awk' 'X11_WWW=x-www-browser' '--libexecdir=/usr/lib' '--with-x' '--with-screen=slang' '--disable-rpath' '--disable-static' '--disable-silent-rules' '--enable-aspell' '--enable-vfs-sftp' '--enable-vfs-undelfs' '--enable-tests' 'build_alias=x86_64-linux-gnu' 'CFLAGS=-g -O2 -fPIE -fstack-protector-strong -Wformat -Werror=format-security' 'LDFLAGS=-fPIE -pie -Wl,-z,relro -Wl,-z,now -Wl,--as-needed' 'CPPFLAGS=-D_FORTIFY_SOURCE=2'

[and]

support %lf and other long specifiers

[andrew_b]

-    keyword %\[#0\s-\+,\]\[0123456789\*\]\[.\]\[0123456789\*\]\[L\]\{eEfgGoxX\} brightgreen
+    keyword %\[#0\s-\+,\]\[0123456789\*\]\[.\]\[0123456789\*\]\[Ll\]\{eEfgGoxX\} brightgreen

Are you sure your patch is valid for languages other than C/C++?