update to multiline echo and set shebangs to /bin/sh

docs/language_servers.md

@@ -11,8 +11,8 @@ Install language server, and create executable to enable server in juCi++:
 npm install -g flow-bin
 
 # usually as root:
-echo -e '#!`which sh`\nflow lsp' > /usr/local/bin/javascript-language-server
-
+echo '#!/bin/sh
+flow lsp' > /usr/local/bin/javascript-language-server
 chmod 755 /usr/local/bin/javascript-language-server
 ```
 
@@ -30,7 +30,8 @@ Install language server, and create executable to enable server in juCi++:
 npm install -g typescript-language-server typescript
 
 # usually as root:
-echo -e '#!`which sh`\n`npm root -g`/typescript-language-server/lib/cli.js --stdio' > /usr/local/bin/javascript-language-server
+echo '#!/bin/sh
+`npm root -g`/typescript-language-server/lib/cli.js --stdio' > /usr/local/bin/javascript-language-server
 
 chmod 755 /usr/local/bin/javascript-language-server
 rm -f /usr/local/bin/typescript-language-server
@@ -88,6 +89,7 @@ cmake ..
 make
 # usually as root:
 make install
-echo -e "#!`which sh`\n/usr/local/bin/glslls --stdin" > /usr/local/bin/glsl-language-server
+echo '#!/bin/sh
+/usr/local/bin/glslls --stdin' > /usr/local/bin/glsl-language-server
 chmod 755 /usr/local/bin/glsl-language-server
 ```