Cleaned up some extraneous whitespace characters

.gitattributes

@@ -14,4 +14,3 @@
 # Text files to always have LF (unix) line endings on checkout.
 *.sh text eol=lf
 *.zig text eol=lf
-

README.md

@@ -163,4 +163,3 @@ Planned exercises:
 The initial topics for these exercises were unabashedly cribbed from
 [ziglearn.org](https://ziglearn.org/). I've since moved things around
 in an order that I think best lets each topic build upon each other.
-

patches/README.md

@@ -32,4 +32,3 @@ $ zig build -Dhealed [step]
 Another Bash shell script named `gollum.sh` may also be found. He snatches the
 original answers and stows them in his secret answers stash. If you leave him
 alone, he'll leave you alone.
-