Package: elpa-notmuch
Version: 0.28.3-1
Severity: minor

From within *notmuch-search-tag:Red label* I expected one of +"Red
label", +'Red label', +"Red\ label", and +'Red\ label', plus
variations with the '+' inside quotes would work, but it doesn't seem
to.

notmuch tag +"Bogus Test Tag" tag:"Red Label" works 100% fine.

The issue seems to be that the regex and form of
notmuch-tag.el:L466-67 is too strict.

I would imagine that this primarily affects users who are using or
migrating away from GMail, who often spaces in their GMail label names.

-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.19.34 (SMP w/2 CPU cores)
Kernel taint flags: TAINT_OOT_MODULE
Locale: LANG=en_CA.UTF-8, LC_CTYPE=en_CA.UTF-8 (charmap=UTF-8), LANGUAGE=en_CA:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages elpa-notmuch depends on:
ii  emacsen-common  3.0.4

elpa-notmuch recommends no packages.

elpa-notmuch suggests no packages.

-- no debconf information