prefer sh to bash in the docs

docs/development/build-instructions-linux.md

@@ -16,7 +16,7 @@ Follow the guidelines below for building Electron on Linux.
 
 On Ubuntu, install the following libraries:
 
-```bash
+```sh
 $ sudo apt-get install build-essential clang libdbus-1-dev libgtk2.0-dev \
                        libnotify-dev libgnome-keyring-dev libgconf2-dev \
                        libasound2-dev libcap-dev libcups2-dev libxtst-dev \
@@ -26,7 +26,7 @@ $ sudo apt-get install build-essential clang libdbus-1-dev libgtk2.0-dev \
 
 On RHEL / CentOS, install the following libraries:
 
-```bash
+```sh
 $ sudo yum install clang dbus-devel gtk2-devel libnotify-devel \
                    libgnome-keyring-devel xorg-x11-server-utils libcap-devel \
                    cups-devel libXtst-devel alsa-lib-devel libXrandr-devel \
@@ -35,7 +35,7 @@ $ sudo yum install clang dbus-devel gtk2-devel libnotify-devel \
 
 On Fedora, install the following libraries:
 
-```bash
+```sh
 $ sudo dnf install clang dbus-devel gtk2-devel libnotify-devel \
                    libgnome-keyring-devel xorg-x11-server-utils libcap-devel \
                    cups-devel libXtst-devel alsa-lib-devel libXrandr-devel \
@@ -47,7 +47,7 @@ managers such as pacman. Or one can compile from source code.
 
 ## Getting the Code
 
-```bash
+```sh
 $ git clone https://github.com/electron/electron
 ```
 
@@ -58,7 +58,7 @@ the build project files. You must have Python 2.7.x for the script to succeed.
 Downloading certain files can take a long time. Notice that we are using
 `ninja` to build Electron so there is no `Makefile` generated.
 
-```bash
+```sh
 $ cd electron
 $ ./script/bootstrap.py --verbose
 ```
@@ -68,14 +68,14 @@ $ ./script/bootstrap.py --verbose
 If you want to build for an `arm` target you should also install the following
 dependencies:
 
-```bash
+```sh
 $ sudo apt-get install libc6-dev-armhf-cross linux-libc-dev-armhf-cross \
                        g++-arm-linux-gnueabihf
 ```
 
 Similarly for `arm64`, install the following:
 
-```bash
+```sh
 $ sudo apt-get install libc6-dev-arm64-cross linux-libc-dev-arm64-cross \
                        g++-aarch64-linux-gnu
 ```
@@ -83,7 +83,7 @@ $ sudo apt-get install libc6-dev-arm64-cross linux-libc-dev-arm64-cross \
 And to cross-compile for `arm` or `ia32` targets, you should pass the
 `--target_arch` parameter to the `bootstrap.py` script:
 
-```bash
+```sh
 $ ./script/bootstrap.py -v --target_arch=arm
 ```
 
@@ -91,7 +91,7 @@ $ ./script/bootstrap.py -v --target_arch=arm
 
 If you would like to build both `Release` and `Debug` targets:
 
-```bash
+```sh
 $ ./script/build.py
 ```
 
@@ -100,7 +100,7 @@ the directory `out/R`. The file size is in excess of 1.3 gigabytes. This
 happens because the Release target binary contains debugging symbols.
 To reduce the file size, run the `create-dist.py` script:
 
-```bash
+```sh
 $ ./script/create-dist.py
 ```
 
@@ -110,7 +110,7 @@ may want to remove the 1.3+ gigabyte binary which is still in `out/R`.
 
 You can also build the `Debug` target only:
 
-```bash
+```sh
 $ ./script/build.py -c D
 ```
 
@@ -120,13 +120,13 @@ After building is done, you can find the `electron` debug binary under `out/D`.
 
 To clean the build files:
 
-```bash
+```sh
 $ npm run clean
 ```
 
 To clean only `out` and `dist` directories:
 
-```bash
+```sh
 $ npm run clean-build
 ```
 
@@ -139,7 +139,7 @@ $ npm run clean-build
 Prebuilt `clang` will try to link to `libtinfo.so.5`. Depending on the host
 architecture, symlink to appropriate `libncurses`:
 
-```bash
+```sh
 $ sudo ln -s /usr/lib/libncurses.so.5 /usr/lib/libtinfo.so.5
 ```
 
@@ -161,19 +161,19 @@ To avoid using the prebuilt binaries of `libchromiumcontent`, you can build `lib
 2. Install [additional build dependencies](https://chromium.googlesource.com/chromium/src/+/master/docs/linux_build_instructions.md#Install-additional-build-dependencies)
 3. Fetch the git submodules:
   
-```bash
+```sh
 $ git submodule update --init --recursive
 ```
 4. Pass the `--build_release_libcc` switch to `bootstrap.py` script:
 
-```bash
+```sh
 $ ./script/bootstrap.py -v --build_release_libcc
 ```
 
 Note that by default the `shared_library` configuration is not built, so you can
 only build `Release` version of Electron if you use this mode:
 
-```bash
+```sh
 $ ./script/build.py -c R
 ```
 
@@ -188,7 +188,7 @@ in `<path>/bin/`.
 
 For example if you installed `clang` under `/user/local/bin/clang`:
 
-```bash
+```sh
 $ ./script/bootstrap.py -v --build_release_libcc --clang_dir /usr/local
 $ ./script/build.py -c R
 ```
@@ -201,7 +201,7 @@ variables to the ones you want.
 
 For example building with GCC toolchain:
 
-```bash
+```sh
 $ env CC=gcc CXX=g++ ./script/bootstrap.py -v --build_release_libcc --disable_clang
 $ ./script/build.py -c R
 ```