Fixes typos, missing or misplaced characters, and grammar issues

[mawiesne]

As the title says.

[mawiesne]

@kinow @garydgregory FYI.

[codecov-commenter]

Codecov Report

Merging #299 (d0a5d1e) into master (95ff23f) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #299   +/-   ##
=========================================
  Coverage     59.77%   59.77%           
  Complexity     1785     1785           
=========================================
  Files            57       57           
  Lines          7415     7415           
  Branches        419      419           
=========================================
  Hits           4432     4432           
  Misses         2767     2767           
  Partials        216      216           

Files Changed	Coverage Δ
...org/apache/commons/dbcp2/DelegatingConnection.java	43.79% <ø> (ø)
.../org/apache/commons/dbcp2/DelegatingResultSet.java	45.61% <ø> (ø)
...a/org/apache/commons/dbcp2/PoolableConnection.java	68.46% <ø> (ø)
...pache/commons/dbcp2/PoolablePreparedStatement.java	85.18% <ø> (ø)
...va/org/apache/commons/dbcp2/PoolingConnection.java	81.70% <ø> (ø)
...ache/commons/dbcp2/cpdsadapter/ConnectionImpl.java	50.76% <ø> (ø)
...ommons/dbcp2/cpdsadapter/PooledConnectionImpl.java	52.07% <ø> (ø)
.../dbcp2/datasources/KeyedCPDSConnectionFactory.java	65.85% <ø> (ø)
...mmons/dbcp2/datasources/PerUserPoolDataSource.java	88.95% <ø> (ø)
...ommons/dbcp2/managed/LocalXAConnectionFactory.java	90.24% <ø> (ø)
... and 2 more

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[kinow]

Thank you!