BWA-0.7.19 (r1273)

Notable changes:

• Bugfix: internal @HD lines. The bug was introduced in 0.7.18.
• Merged #414, #391, #346, #312, #311, #308, #291, #288, #286 and #212

BWA produces alignments identical to v0.7.17 and v0.7.18.

(0.7.19: 22 March 2025, r1273)