Many manifest fixes and improvements

Many entry_text fields have been changed, some to make it more
consistent with others (though most likely some slipped through) and
others to make it more correct.

The recent commits which changed filenames are in this update but the
rest of the process will be done soon as part of the same pull request.

tmp/path_list.built.txt

@@ -397,7 +397,7 @@
 1995/leo/1995_leo.tar.bz2
 1995/leo/index.html
 1995/leo/leo.orig.c
-1995/leo/spoiler1.html
+1995/leo/spoiler.html
 1995/makarios/.path
 1995/makarios/1995_makarios.tar.bz2
 1995/makarios/index.html

tmp/path_list.found.txt

@@ -1167,8 +1167,8 @@
 1995/leo/index.html
 1995/leo/leo.c
 1995/leo/leo.orig.c
-1995/leo/spoiler1.html
-1995/leo/spoiler1.md
+1995/leo/spoiler.html
+1995/leo/spoiler.md
 1995/leo/try.sh
 1995/makarios/.entry.json
 1995/makarios/.gitignore
@@ -2977,7 +2977,7 @@
 2013/cable3/screenshot_lotus123.png
 2013/cable3/screenshot_qbasic.png
 2013/cable3/screenshot_simcity.png
-2013/cable3/screenshot_win3_on_macosx.png
+2013/cable3/screenshot_win3.png
 2013/dlowe/.entry.json
 2013/dlowe/.gitignore
 2013/dlowe/.path

tmp/path_list.manifest.txt

@@ -1167,8 +1167,8 @@
 1995/leo/index.html
 1995/leo/leo.c
 1995/leo/leo.orig.c
-1995/leo/spoiler1.html
-1995/leo/spoiler1.md
+1995/leo/spoiler.html
+1995/leo/spoiler.md
 1995/leo/try.sh
 1995/makarios/.entry.json
 1995/makarios/.gitignore
@@ -2977,7 +2977,7 @@
 2013/cable3/screenshot_lotus123.png
 2013/cable3/screenshot_qbasic.png
 2013/cable3/screenshot_simcity.png
-2013/cable3/screenshot_win3_on_macosx.png
+2013/cable3/screenshot_win3.png
 2013/dlowe/.entry.json
 2013/dlowe/.gitignore
 2013/dlowe/.path

tmp/path_list.required.txt

@@ -768,7 +768,7 @@
 1995/leo/Makefile
 1995/leo/README.md
 1995/leo/leo.c
-1995/leo/spoiler1.md
+1995/leo/spoiler.md
 1995/leo/try.sh
 1995/makarios/.entry.json
 1995/makarios/.gitignore
@@ -2075,7 +2075,7 @@
 2013/cable3/screenshot_lotus123.png
 2013/cable3/screenshot_qbasic.png
 2013/cable3/screenshot_simcity.png
-2013/cable3/screenshot_win3_on_macosx.png
+2013/cable3/screenshot_win3.png
 2013/dlowe/.entry.json
 2013/dlowe/.gitignore
 2013/dlowe/Makefile