5.3.2
Handle image and line regions in output formats ALTO, hOCR and text
Avoid conversions from std::string to char* to std::string
capi: Fix calling delete[] for memory allocated by malloc
Fix a number of performance issues (reported by Coverity Scan)
Add braces to single line statements (clang-tidy -checks='-*,google-readability-braces-around-statements')
[clang-format] Execute clang format on include and src dirs.
pdfrenderer.cpp: Ignore non-text blocks
Check input for `AppendString` to avoid `strlen(nullptr)`.