Add 2018/endoh1/try.sh + format/typo checks

The try.sh script shows each input file first so that one can see how it
turns out as a GIF file. The input files include those not suggested by
the judges including the source code itself (the author suggested it has
a message too).

The README.md file has been format/typo checked.

2018/endoh1/README.md

@@ -14,16 +14,17 @@ make
 
 ### Try:
 
+To see the input files and feed them to the program, redirecting to GIF files:
+
 ```sh
-./prog < golem.txt > golem.gif
-./prog < smily.txt > smily.gif
+./try.sh
 ```
 
 
 ## Judges' remarks:
 
-To get the best experience, use a GIF viewer that can handle animated gifs.
-On OS X you can use Safari using "open -a Safari smily.gif"
+To get the best experience, use a GIF viewer that can handle animated GIFs.
+With macOS you can use Safari using `open -a Safari smily.gif`.
 
 Some things to consider are that this 2.5KiB gem encodes a 96 character 8x8
 font (naively this could already take 6144 bytes) and a GIF encoder.  But
@@ -44,8 +45,9 @@ cc -o prog prog.c
 ./prog < invisible.txt > invisible.gif
 ```
 
-Open invisible.gif and then wait a minute.  You will see a hidden message.
-Can you tell the difference between letters that leaves the mark and ones that does not?
+Open `invisible.gif` with a GIF viewer that can show animated GIFs and then wait
+a minute.  You will see a hidden message.  Can you tell the difference between
+letters that leave the mark and ones that do not?
 
 Other examples:
 

2018/endoh1/try.sh

@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+#
+# try.sh - demonstrate IOCCC winner 2018/endoh1
+#
+
+# make sure CC is set so that when we do make CC="$CC" it isn't empty. Doing it
+# this way allows us to have the user specify a different compiler in an easy
+# way.
+if [[ -z "$CC" ]]; then
+    CC="cc"
+fi
+
+make CC="$CC" all >/dev/null || exit 1
+
+# clear screen after compilation so that only the entry is shown
+clear
+
+read -r -n 1 -p "Press any key to show prog.c (space = next page, q = quit): "
+echo 1>&2
+less -EXF prog.c
+echo "$ ./prog < prog.c > prog.gif" 1>&2
+./prog < prog.c > prog.gif
+echo 1>&2
+
+read -r -n 1 -p "Press any key to show golem.txt (space = next page, q = quit): "
+echo 1>&2
+less -EXF golem.txt
+echo "$ ./prog < golem.txt > golem.gif" 1>&2
+./prog < golem.txt > golem.gif
+echo 1>&2
+
+read -r -n 1 -p "Press any key to show smily.txt (space = next page, q = quit): "
+echo 1>&2
+less -EXF smily.txt
+echo "$ ./prog < smily.txt > smily.gif" 1>&2
+./prog < smily.txt > smily.gif
+echo 1>&2
+
+read -r -n 1 -p "Press any key to show invisible.txt (space = next page, q = quit): "
+less -EXF invisible.txt
+echo "$ ./prog < invisible.txt > invisible.gif" 1>&2
+./prog < invisible.txt > invisible.gif
+echo 1>&2
+
+echo "Now open the GIF files prog.gif, golem.gif, smily.gif and invisible.gif" 1>&2
+echo "in a GIF viewer that can display animation in animated GIFs." 1>&2
+echo 1>&2
+echo "If you use macOS you can open them all in Safari, one tab per image, like: " 1>&2
+echo 1>&2
+echo "	open -a Safari prog.gif golem.gif smily.gif invisible.gif" 1>&2
+echo 1>&2
+echo "Once they're open make sure to watch as they change form." 1>&2

thanks-for-help.md

@@ -3968,6 +3968,16 @@ work for Windows, based on the author's remarks.
 Internet Wayback Machine.
 
 
+## <a name="2018_endoh1"></a>[2018/endoh1](/2018/endoh1/prog.c) ([README.md](/2018/endoh1/README.md))
+
+[Cody](#cody) added the [try.sh](/2018/endoh1/try.sh) script which shows the
+input files one at a time and after each one is shown, it feeds it to the
+program, redirecting the output to the respective GIF file. It then will inform
+the user they should open it in a GIF viewer that can show animation in animated
+GIF files. It offers an example command for macOS like the judges did in their
+remarks. The input files offered includes the prog.c as the author,
+[Yusuke](#yusuke), suggested that it too has a secret.
+
 
 ## <a name="2018_endoh2"></a>[2018/endoh2](/2018/endoh2/prog.c) ([README.md](/2018/endoh2/README.md))