more modeline errata (#1019)

Somehow or another, I previously had missed `BUILD.mk` files.

In the process I found a few straggler cases where the modeline was
different from the file, including one very involved manual fix where a
file had been treated like it was ts=2 and ts=8 on separate occasions.

The commit history in the PR shows the gory details; the BUILD.mk was
automated, everything else was mostly manual.

tool/BUILD.mk

@@ -1,5 +1,5 @@
 #-*-mode:makefile-gmake;indent-tabs-mode:t;tab-width:8;coding:utf-8-*-┐
-#── vi: set et ft=make ts=8 sw=8 fenc=utf-8 :vi ──────────────────────┘
+#── vi: set noet ft=make ts=8 sw=8 fenc=utf-8 :vi ────────────────────┘
 
 .PHONY:	o/$(MODE)/tool
 o/$(MODE)/tool:			\

tool/args/BUILD.mk

@@ -1,5 +1,5 @@
 #-*-mode:makefile-gmake;indent-tabs-mode:t;tab-width:8;coding:utf-8-*-┐
-#── vi: set et ft=make ts=8 sw=8 fenc=utf-8 :vi ──────────────────────┘
+#── vi: set noet ft=make ts=8 sw=8 fenc=utf-8 :vi ────────────────────┘
 
 PKGS += TOOL_ARGS
 

tool/build/BUILD.mk

@@ -1,5 +1,5 @@
 #-*-mode:makefile-gmake;indent-tabs-mode:t;tab-width:8;coding:utf-8-*-┐
-#── vi: set et ft=make ts=8 sw=8 fenc=utf-8 :vi ──────────────────────┘
+#── vi: set noet ft=make ts=8 sw=8 fenc=utf-8 :vi ────────────────────┘
 
 PKGS += TOOL_BUILD
 

tool/build/lib/BUILD.mk

@@ -1,5 +1,5 @@
 #-*-mode:makefile-gmake;indent-tabs-mode:t;tab-width:8;coding:utf-8-*-┐
-#── vi: set et ft=make ts=8 sw=8 fenc=utf-8 :vi ──────────────────────┘
+#── vi: set noet ft=make ts=8 sw=8 fenc=utf-8 :vi ────────────────────┘
 
 PKGS += TOOL_BUILD_LIB
 

tool/curl/BUILD.mk

@@ -1,5 +1,5 @@
 #-*-mode:makefile-gmake;indent-tabs-mode:t;tab-width:8;coding:utf-8-*-┐
-#── vi: set et ft=make ts=8 sw=8 fenc=utf-8 :vi ──────────────────────┘
+#── vi: set noet ft=make ts=8 sw=8 fenc=utf-8 :vi ────────────────────┘
 
 PKGS += TOOL_CURL
 

tool/decode/BUILD.mk

@@ -1,5 +1,5 @@
 #-*-mode:makefile-gmake;indent-tabs-mode:t;tab-width:8;coding:utf-8-*-┐
-#── vi: set et ft=make ts=8 sw=8 fenc=utf-8 :vi ──────────────────────┘
+#── vi: set noet ft=make ts=8 sw=8 fenc=utf-8 :vi ────────────────────┘
 
 PKGS += TOOL_DECODE
 

tool/decode/lib/BUILD.mk

@@ -1,5 +1,5 @@
 #-*-mode:makefile-gmake;indent-tabs-mode:t;tab-width:8;coding:utf-8-*-┐
-#── vi: set et ft=make ts=8 sw=8 fenc=utf-8 :vi ──────────────────────┘
+#── vi: set noet ft=make ts=8 sw=8 fenc=utf-8 :vi ────────────────────┘
 
 PKGS += TOOL_DECODE_LIB
 

tool/hello/BUILD.mk

@@ -1,5 +1,5 @@
 #-*-mode:makefile-gmake;indent-tabs-mode:t;tab-width:8;coding:utf-8-*-┐
-#── vi: set et ft=make ts=8 sw=8 fenc=utf-8 :vi ──────────────────────┘
+#── vi: set noet ft=make ts=8 sw=8 fenc=utf-8 :vi ────────────────────┘
 
 PKGS += TOOL_HELLO
 

tool/lambda/BUILD.mk

@@ -1,5 +1,5 @@
 #-*-mode:makefile-gmake;indent-tabs-mode:t;tab-width:8;coding:utf-8-*-┐
-#── vi: set et ft=make ts=8 sw=8 fenc=utf-8 :vi ──────────────────────┘
+#── vi: set noet ft=make ts=8 sw=8 fenc=utf-8 :vi ────────────────────┘
 
 PKGS += TOOL_LAMBDA
 

tool/lambda/lib/BUILD.mk

@@ -1,5 +1,5 @@
 #-*-mode:makefile-gmake;indent-tabs-mode:t;tab-width:8;coding:utf-8-*-┐
-#── vi: set et ft=make ts=8 sw=8 fenc=utf-8 :vi ──────────────────────┘
+#── vi: set noet ft=make ts=8 sw=8 fenc=utf-8 :vi ────────────────────┘
 
 PKGS += TOOL_LAMBDA_LIB
 

tool/net/BUILD.mk

@@ -1,5 +1,5 @@
 #-*-mode:makefile-gmake;indent-tabs-mode:t;tab-width:8;coding:utf-8-*-┐
-#── vi: set et ft=make ts=8 sw=8 fenc=utf-8 :vi ──────────────────────┘
+#── vi: set noet ft=make ts=8 sw=8 fenc=utf-8 :vi ────────────────────┘
 
 PKGS += TOOL_NET
 

tool/net/largon2.c

@@ -1,5 +1,5 @@
 /*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8   -*-│
-│ vi: set noet ft=c ts=8 sw=8 fenc=utf-8                                   :vi │
+│ vi: set et ft=c ts=8 sw=8 fenc=utf-8                                     :vi │
 ╚──────────────────────────────────────────────────────────────────────────────╝
 │                                                                              │
 │  largon2                                                                     │

tool/plinko/BUILD.mk

@@ -1,5 +1,5 @@
 #-*-mode:makefile-gmake;indent-tabs-mode:t;tab-width:8;coding:utf-8-*-┐
-#── vi: set et ft=make ts=8 sw=8 fenc=utf-8 :vi ──────────────────────┘
+#── vi: set noet ft=make ts=8 sw=8 fenc=utf-8 :vi ────────────────────┘
 
 ifeq ($(ARCH), x86_64)
 

tool/plinko/lib/BUILD.mk

@@ -1,5 +1,5 @@
 #-*-mode:makefile-gmake;indent-tabs-mode:t;tab-width:8;coding:utf-8-*-┐
-#── vi: set et ft=make ts=8 sw=8 fenc=utf-8 :vi ──────────────────────┘
+#── vi: set noet ft=make ts=8 sw=8 fenc=utf-8 :vi ────────────────────┘
 
 ifeq ($(ARCH), x86_64)
 

tool/viz/BUILD.mk

@@ -1,5 +1,5 @@
 #-*-mode:makefile-gmake;indent-tabs-mode:t;tab-width:8;coding:utf-8-*-┐
-#── vi: set et ft=make ts=8 sw=8 fenc=utf-8 :vi ──────────────────────┘
+#── vi: set noet ft=make ts=8 sw=8 fenc=utf-8 :vi ────────────────────┘
 
 PKGS += TOOL_VIZ
 

tool/viz/lib/BUILD.mk

@@ -1,5 +1,5 @@
 #-*-mode:makefile-gmake;indent-tabs-mode:t;tab-width:8;coding:utf-8-*-┐
-#── vi: set et ft=make ts=8 sw=8 fenc=utf-8 :vi ──────────────────────┘
+#── vi: set noet ft=make ts=8 sw=8 fenc=utf-8 :vi ────────────────────┘
 
 PKGS += TOOL_VIZ_LIB