[fix-build] Fix completed-docs rule

[rwaskiewicz]

• Addresses an existing issue: No issue logged, but was discussed in [new-rule]prefer-while rule #3750 (link to conversation)
• New feature, bugfix, or enhancement
  • Includes tests
• Documentation update

Overview of change:

• Fixes building of master
• Add escaping to backticks introduced in Improved "complete docs" docs #3823

Error Seen:

In master (f47aeb3), we see the following error in the latest CI build.

src/rules/completedDocsRule.ts(186,39): error TS1005: ']' expected.
src/rules/completedDocsRule.ts(186,86): error TS1128: Declaration or statement expected.
src/rules/completedDocsRule.ts(222,16): error TS1005: ';' expected.
src/rules/completedDocsRule.ts(224,18): error TS1005: ';' expected.
src/rules/completedDocsRule.ts(256,13): error TS1109: Expression expected.
src/rules/completedDocsRule.ts(256,14): error TS1128: Declaration or statement expected.
src/rules/completedDocsRule.ts(257,10): error TS1128: Declaration or statement expected.
src/rules/completedDocsRule.ts(283,18): error TS1005: ';' expected.
src/rules/completedDocsRule.ts(289,13): error TS1005: ';' expected.
src/rules/completedDocsRule.ts(290,23): error TS1005: ';' expected.
src/rules/completedDocsRule.ts(291,25): error TS1005: ';' expected.
src/rules/completedDocsRule.ts(292,5): error TS1109: Expression expected.
src/rules/completedDocsRule.ts(295,5): error TS1128: Declaration or statement expected.
src/rules/completedDocsRule.ts(295,13): error TS1128: Declaration or statement expected.
src/rules/completedDocsRule.ts(297,5): error TS1128: Declaration or statement expected.
src/rules/completedDocsRule.ts(297,39): error TS1005: ',' expected.
src/rules/completedDocsRule.ts(297,63): error TS1005: ',' expected.
src/rules/completedDocsRule.ts(297,76): error TS1005: ';' expected.
src/rules/completedDocsRule.ts(297,97): error TS1005: ';' expected.
src/rules/completedDocsRule.ts(304,5): error TS1128: Declaration or statement expected.
src/rules/completedDocsRule.ts(304,43): error TS1005: ',' expected.
src/rules/completedDocsRule.ts(304,88): error TS1005: '(' expected.
src/rules/completedDocsRule.ts(304,89): error TS1005: ',' expected.
src/rules/completedDocsRule.ts(304,105): error TS1005: ',' expected.
src/rules/completedDocsRule.ts(305,26): error TS1005: ',' expected.
src/rules/completedDocsRule.ts(305,34): error TS1005: ',' expected.
src/rules/completedDocsRule.ts(305,41): error TS1005: ';' expected.
src/rules/completedDocsRule.ts(310,5): error TS1128: Declaration or statement expected.
src/rules/completedDocsRule.ts(311,1): error TS1128: Declaration or statement expected.