Update README.md

README.md

@@ -251,7 +251,7 @@ Future enhancements
 Q&A
 ---
 
-### How does it work?
+### Q: How does it work?
 
 Indexing adds a hidden index file `._UG#_Store` to each directory indexed.
 Files indexed are scanned (never changed!) by ugrep-indexer to generate index
@@ -389,7 +389,7 @@ in an indexed file, whereas a standard Bloom filter might have a false positive
 match.  Furthermore, the bit addressing used to index the hashes table enables
 efficient table compression.
 
-### What is indexing accuracy?
+### Q: What is indexing accuracy?
 
 Indexing is a form of lossy compression.  The higher the indexing accuracy, the
 faster ugrep search performance should be by skipping more files that do not
@@ -407,12 +407,12 @@ many files are not skipped from searching due to indexing noise (i.e. false
 positives), then a higher accuracy helps to increase the effectiveness of
 indexing, which may speed up searching.
 
-### What about UTF-16 and UTF-32 files?
+### Q: What about UTF-16 and UTF-32 files?
 
 UTF-16 and UTF-32 files are indexed too.  The indexer treats them as UTF-8
 after internally converting them.
 
-### Why bother indexing archives and compressed files?
+### Q: Why bother indexing archives and compressed files?
 
 Archiving (zip/tar/pax/cpio) and compressing files saves disk space.  On the
 other hand, searching archives and compressed files is slower than searching
@@ -424,7 +424,7 @@ the addition of index file entries for archives and compressed files.  Note
 that when archives and compressed files contain binaries, option `-I` ignores
 these archived/compressed binaries.
 
-### Why is the start-up time of ugrep higher with option --index?
+### Q: Why is the start-up time of ugrep higher with option --index?
 
 The start-up overhead of `ugrep --index` to construct indexing hash tables
 depends on the regex patterns.  If a regex pattern is very "permissive", i.e.
@@ -435,7 +435,7 @@ Unicode character classes and wildcards are used, especially with the unlimited
 `ugrep --index -r PATTERN /dev/null --stats=vm` to search /dev/null with your
 PATTERN.
 
-### Why are index files not compressed?
+### Q: Why are index files not compressed?
 
 Index files should be very dense in information content and that is the case
 with this new indexing algorithm for ugrep that I designed and implemented.