Minimize the use of echo statements

Signed-off-by: Chanaka Indrajith <pe.chanaka.ck@gmail.com>
Remove unnecessary back slasses and used sigle quotes for strings

Signed-off-by: Chanaka Indrajith <pe.chanaka.ck@gmail.com>
Removed html comments

Signed-off-by: Chanaka Indrajith <pe.chanaka.ck@gmail.com>
Modified the broken link to GitHub installer issues page

Signed-off-by: Chanaka Indrajith <pe.chanaka.ck@gmail.com>
Added space

Signed-off-by: Chanaka Indrajith <pe.chanaka.ck@gmail.com>