Fix script issues identified through shellcheck (#258)

* Fix spelling

* Fix shellcheck-identified warnings in shell scripts

.github/ISSUE_TEMPLATE/issue-report.md

@@ -11,7 +11,7 @@ PLEASE READ BEFORE REPORTING AN ISSUE
 
 SSHFS does not have any active, regular contributors or developers. The current maintainer continues to apply pull requests and tries to make regular releases, but unfortunately has no capacity to do any development beyond addressing high-impact issues. When reporting bugs, please understand that unless you are including a pull request or are reporting a critical issue, you will probably not get a response.
 
-To prevent the issue tracker from being flooded with issues that no-one is intending to work on, and to give more visibilty to critical issues that users should be aware of and that most urgently need attention, I will also close most bug reports once they've been inactive for a while.
+To prevent the issue tracker from being flooded with issues that no-one is intending to work on, and to give more visibility to critical issues that users should be aware of and that most urgently need attention, I will also close most bug reports once they've been inactive for a while.
 
 Please note that this isn't meant to imply that you haven't found a bug - you most likely have and I'm grateful that you took the time to report it. Unfortunately, SSHFS is a purely volunteer driven project,
 and at the moment there simply aren't any volunteers.

compat/fuse_opt.h

@@ -18,7 +18,7 @@ extern "C" {
 /**
  * Option description
  *
- * This structure describes a single option, and and action associated
+ * This structure describes a single option, and an action associated
  * with it, in case it matches.
  *
  * More than one such match may occur, in which case the action for

test/appveyor-build.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 machine=$(uname -m)
-mkdir build-$machine
-cd build-$machine
+mkdir "build-$machine"
+cd "build-$machine"
 meson ..
 ninja

test/travis-build.sh

@@ -13,8 +13,8 @@ TEST_CMD="python3 -m pytest --maxfail=99 test/"
 
 # Standard build with Valgrind
 for CC in gcc clang; do
-    mkdir build-${CC}; cd build-${CC}
-    if [ ${CC} == 'gcc-6' ]; then
+    mkdir "build-${CC}"; cd "build-${CC}"
+    if [ "${CC}" == 'gcc-6' ]; then
         build_opts='-D b_lundef=false'
     else
         build_opts=''
@@ -25,12 +25,12 @@ for CC in gcc clang; do
     TEST_WITH_VALGRIND=true ${TEST_CMD}
     cd ..
 done
-(cd build-$CC; sudo ninja install)
+(cd "build-${CC}"; sudo ninja install)
 
 # Sanitized build
 CC=clang
 for san in undefined address; do
-    mkdir build-${san}; cd build-${san}
+    mkdir "build-${san}"; cd "build-${san}"
     # b_lundef=false is required to work around clang
     # bug, cf. https://groups.google.com/forum/#!topic/mesonbuild/tgEdAXIIdC4
     meson -D b_sanitize=${san} -D b_lundef=false -D werror=true ..

test/travis-install.sh

@@ -13,7 +13,7 @@ ninja
 sudo ninja install
 test -e /usr/local/lib/pkgconfig || sudo mkdir /usr/local/lib/pkgconfig
 sudo mv /usr/local/lib/*/pkgconfig/* /usr/local/lib/pkgconfig/
-ls -d1 /usr/local/lib/*-linux-gnu | sudo tee /etc/ld.so.conf.d/usrlocal.conf
+printf '%s\n' /usr/local/lib/*-linux-gnu | sudo tee /etc/ld.so.conf.d/usrlocal.conf
 sudo ldconfig
 
 # Setup ssh