Ensure CRLF line endings are preserved when necessary

Some test cases need CRLF line endings checked out even on Unix.
Also some source files had inadvertently contained CR bytes.

test/asm/.gitattributes

@@ -0,0 +1,4 @@
+# Some files test CRLF line endings
+character-escapes.out -text diff
+crlf.asm text eol=crlf
+string-literal-macro-arg.out -text diff

test/asm/crlf.asm

@@ -8,6 +8,15 @@ assert !strcmp("{s}", "Hello, world!")
  * block comment
  */
 
-DEF t EQUS """Hello,
+REPT 2
+	REDEF t EQUS """Hello,
 world!"""
-assert !strcmp("{t}", "Hello,\nworld!")
+	assert !strcmp("{t}", "Hello,\nworld!")
+ENDR
+
+MACRO m
+	assert "\1" === "Hello, world!"
+ENDM
+
+m Hello\, \
+world!

test/asm/fixed-point-specific.asm

@@ -1,24 +1,24 @@
-MACRO compare
-	print "\3: "
-	if _NARG == 4
-		def v1 = \3(\4q\1, \1)
-		def v2 = \3(\4q\2, \2)
-	elif _NARG == 5
-		def v1 = \3(\4q\1, \5q\1, \1)
-		def v2 = \3(\4q\2, \5q\2, \2)
-	endc
-	println "{.4q\1f:v1} == {.4q\2f:v2}"
-ENDM
-
-	compare  8, 16, mul, 6.0, 7.0
-	compare 12, 24, div, 115.625, 9.25
-	compare  7, 14, pow, 3.5, 5.5
-
-	compare  4,  8, sin, 0.25
-	compare  5,  9, cos, 0.75
-	compare  6, 10, asin, 1.0
-	compare  7, 11, acos, 0.0
-
-	compare  3,  6, round, 1.75
-	compare 10, 20, ceil, 123.4
-	compare 13, 17, floor, 567.8
+MACRO compare
+	print "\3: "
+	if _NARG == 4
+		def v1 = \3(\4q\1, \1)
+		def v2 = \3(\4q\2, \2)
+	elif _NARG == 5
+		def v1 = \3(\4q\1, \5q\1, \1)
+		def v2 = \3(\4q\2, \5q\2, \2)
+	endc
+	println "{.4q\1f:v1} == {.4q\2f:v2}"
+ENDM
+
+	compare  8, 16, mul, 6.0, 7.0
+	compare 12, 24, div, 115.625, 9.25
+	compare  7, 14, pow, 3.5, 5.5
+
+	compare  4,  8, sin, 0.25
+	compare  5,  9, cos, 0.75
+	compare  6, 10, asin, 1.0
+	compare  7, 11, acos, 0.0
+
+	compare  3,  6, round, 1.75
+	compare 10, 20, ceil, 123.4
+	compare 13, 17, floor, 567.8

test/asm/section-union-data.asm

@@ -1,2 +1,2 @@
-SECTION UNION "wat", ROM0
-db 42
+SECTION UNION "wat", ROM0
+db 42

test/link/.gitattributes

@@ -0,0 +1,2 @@
+# Some files test CRLF line endings
+linkerscript-escapes-test.link -text diff