update devel/difftastic to 0.40.0

diff from MAINTAINER Volker Schlecht, thanks!  Some minor tweaks by me.

devel/difftastic/Makefile

@@ -2,7 +2,7 @@ COMMENT =		diff tool that compares files based on their syntax
 
 GH_ACCOUNT =		Wilfred
 GH_PROJECT =		difftastic
-GH_TAGNAME =		0.37.0
+GH_TAGNAME =		0.40.0
 
 HOMEPAGE =		https://difftastic.wilfred.me.uk/
 
@@ -13,14 +13,11 @@ CATEGORIES =		devel
 # MIT
 PERMIT_PACKAGE =	Yes
 
-# as devel/cargo MODULES adds DISTFILES, GH_* didn't
-DISTFILES +=		${DISTNAME}${EXTRACT_SUFX}
+DISTFILES +=		${GH_DISTFILE}
 MODULES =		devel/cargo
 BUILD_DEPENDS = 	textproc/mdbook
-
-WANTLIB += 		c c++ c++abi m pthread
-
-.include "crates.inc"
+COMPILER =		base-clang ports-gcc
+WANTLIB += 		${MODCARGO_WANTLIB} ${COMPILER_LIBCXX} m
 
 CONFIGURE_STYLE =	cargo
 
@@ -41,4 +38,5 @@ post-install:
 	${INSTALL_DATA_DIR} ${DOCDIR}
 	cp -r ${WRKSRC}/html_manual/* ${DOCDIR}
 
+.include "crates.inc"
 .include <bsd.port.mk>

devel/difftastic/crates.inc

@@ -67,7 +67,7 @@ MODCARGO_CRATES +=	terminal_size	0.1.17	# MIT OR Apache-2.0
 MODCARGO_CRATES +=	terminal_size	0.2.1	# MIT OR Apache-2.0
 MODCARGO_CRATES +=	textwrap	0.15.0	# MIT
 MODCARGO_CRATES +=	tree-sitter	0.20.9	# MIT
-MODCARGO_CRATES +=	tree_magic_mini	3.0.3	# MIT
+MODCARGO_CRATES +=	tree_magic_mini 3.0.3   # MIT
 MODCARGO_CRATES +=	typed-arena	2.0.1	# MIT
 MODCARGO_CRATES +=	unicode-ident	1.0.0	# MIT OR Apache-2.0
 MODCARGO_CRATES +=	unicode-width	0.1.9	# MIT/Apache-2.0

devel/difftastic/distinfo

@@ -85,7 +85,7 @@ SHA256 (cargo/windows_i686_msvc-0.36.1.tar.gz) = 4ueRcUiygS0e6vrrIql+SBPfpgo/j3j
 SHA256 (cargo/windows_x86_64_gnu-0.36.1.tar.gz) = Tc0XG4d2xBuXUh5doSei2GrSgBFIB9Cyqx5GK8dk2eE=
 SHA256 (cargo/windows_x86_64_msvc-0.36.1.tar.gz) = yBHKSoyFPvQgq9hZK6U927rJBBD6tpA7PnmXKmMfdoA=
 SHA256 (cargo/wu-diff-0.1.2.tar.gz) = jj5nNfzeBkMocNuNydfjqxuTcnwU6u8ymWlCYpnyiJM=
-SHA256 (difftastic-0.37.0.tar.gz) = pJoym83hhXToFSsFXVu9KhCqnISSymd/v4lj+tMiCUk=
+SHA256 (difftastic-0.40.0.tar.gz) = xURXP5TY0eRkaDyd/V1jAOBQL8yb6jSdLJQiz05M70E=
 SIZE (cargo/aho-corasick-0.7.18.tar.gz) = 112923
 SIZE (cargo/ansi_term-0.12.1.tar.gz) = 24838
 SIZE (cargo/atty-0.2.14.tar.gz) = 5470
@@ -173,4 +173,4 @@ SIZE (cargo/windows_i686_msvc-0.36.1.tar.gz) = 724575
 SIZE (cargo/windows_x86_64_gnu-0.36.1.tar.gz) = 790934
 SIZE (cargo/windows_x86_64_msvc-0.36.1.tar.gz) = 661999
 SIZE (cargo/wu-diff-0.1.2.tar.gz) = 33439
-SIZE (difftastic-0.37.0.tar.gz) = 28624498
+SIZE (difftastic-0.40.0.tar.gz) = 28787155

devel/difftastic/patches/patch-Cargo_lock

@@ -0,0 +1,17 @@
+Revert upstream patch to tree_magic_mini. We cannot pull from github during build.
+https://github.com/Wilfred/difftastic/commit/b662a2220b9e9eae5f69ecbc31195bcfcc5216e1
+Index: Cargo.lock
+--- Cargo.lock.orig
++++ Cargo.lock
+@@ -637,8 +637,9 @@ dependencies = [
+ 
+ [[package]]
+ name = "tree_magic_mini"
+-version = "3.0.2"
+-source = "git+https://github.com/Wilfred/tree_magic?branch=fix-panic-for-empty-strings#13dd6dda15c7062bd8f7dd5bc9bb5b16ce9ee613"
++version = "3.0.3"
++source = "registry+https://github.com/rust-lang/crates.io-index"
++checksum = "91adfd0607cacf6e4babdb870e9bec4037c1c4b151cfd279ccefc5e0c7feaa6d"
+ dependencies = [
+  "bytecount",
+  "fnv",

devel/difftastic/patches/patch-Cargo_toml

@@ -0,0 +1,21 @@
+Revert upstream patch to tree_magic_mini. We cannot pull from github during build.
+https://github.com/Wilfred/difftastic/commit/b662a2220b9e9eae5f69ecbc31195bcfcc5216e1
+Index: Cargo.toml
+--- Cargo.toml.orig
++++ Cargo.toml
+@@ -51,7 +51,7 @@ const_format = "0.2.22"
+ owo-colors = "3.3.0"
+ wu-diff = "0.1.2"
+ rayon = "1.5.2"
+-tree_magic_mini = "3.0.2"
++tree_magic_mini = "3.0.3"
+ bumpalo = "3.9.1"
+ unicode-width = "0.1.9"
+ term_size = "0.3.2"
+@@ -73,6 +73,3 @@ path = "src/main.rs"
+ 
+ [features]
+ 
+-[patch.crates-io]
+-# https://github.com/mbrubeck/tree_magic/pull/13 hasn't been merged yet.
+-tree_magic_mini = { git = 'https://github.com/Wilfred/tree_magic', branch = 'fix-panic-for-empty-strings' }