Fix markdown lint issues in troubleshooting/SETTING_BASH.md

[kadler]

troubleshooting/SETTING_BASH.md:1:81 MD013/line-length Line length [Expected: 80; Actual: 258]
troubleshooting/SETTING_BASH.md:1:1 MD037/no-space-in-emphasis Spaces inside emphasis markers [Context: "*** The bash shell can (and sh..."]
troubleshooting/SETTING_BASH.md:1 MD041/first-line-heading/first-line-h1 First line in file should be a top level heading [Context: "*** The bash shell can (and sh..."]
troubleshooting/SETTING_BASH.md:3:81 MD013/line-length Line length [Expected: 80; Actual: 127]
troubleshooting/SETTING_BASH.md:4:81 MD013/line-length Line length [Expected: 80; Actual: 96]
troubleshooting/SETTING_BASH.md:6 MD012/no-multiple-blanks Multiple consecutive blank lines [Expected: 1; Actual: 2]
troubleshooting/SETTING_BASH.md:7:1 MD037/no-space-in-emphasis Spaces inside emphasis markers [Context: "** Technique #1: chsh**"]
troubleshooting/SETTING_BASH.md:10:81 MD013/line-length Line length [Expected: 80; Actual: 229]
troubleshooting/SETTING_BASH.md:12:1 MD037/no-space-in-emphasis Spaces inside emphasis markers [Context: "** Technique #2: sql**"]
troubleshooting/SETTING_BASH.md:14:81 MD013/line-length Line length [Expected: 80; Actual: 147]
troubleshooting/SETTING_BASH.md:21 MD031/blanks-around-fences Fenced code blocks should be surrounded by blank lines [Context: "```SQL"]
troubleshooting/SETTING_BASH.md:26 MD031/blanks-around-fences Fenced code blocks should be surrounded by blank lines [Context: "```SQL"]
troubleshooting/SETTING_BASH.md:32:207 MD047/single-trailing-newline Files should end with a single newline character