commit 1d939ccdf93a20e1bb9fb67b7aec52143706977b
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
Date:   Wed Nov 2 03:15:03 2022 -0500

    [man,mdoc]: Fix glitch in continuous rendering.
    
    * tmac/an.tmac (an-end):
    * tmac/mdoc/doc-common (doc-end-macro): Ensure that document footer
      appears in continuous rendering mode even when a final pending output
      line in the document is 1v from the page bottom.  Replace `fl` call
      with `br`, which IMO has clearer semantics.  Extend page length by 1v
      before doing so if the current vertical position is within 1v of the
      page bottom.
    
    * tmac/mdoc/doc-common (doc-end-macro): We now need to perform a dynamic
      calculation using registers, so unwrap macro definition with `eo`/`ec`
      requests, and double backslashes in escape sequences that are
      interpreted in copy mode.
    
    Thanks to Alex Colomar for the report.

diff --git a/ChangeLog b/ChangeLog
index 3f620e5c0..171a3c1fc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,20 @@
+2022-11-02  G. Branden Robinson <g.branden.robinson@gmail.com>
+
+	* tmac/an.tmac (an-end):
+	* tmac/mdoc/doc-common (doc-end-macro): Ensure that document
+	footer appears in continuous rendering mode even when a final
+	pending output line in the document is 1v from the page bottom.
+	Replace `fl` call with `br`, which IMO has clearer semantics.
+	Extend page length by 1v before doing so if the current vertical
+	position is within 1v of the page bottom.
+
+	* tmac/mdoc/doc-common (doc-end-macro): We now need to perform a
+	dynamic calculation using registers, so unwrap macro definition
+	with `eo`/`ec` requests, and double backslashes in escape
+	sequences that are interpreted in copy mode.
+
+	Thanks to Alex Colomar for the report.
+
 2022-11-02  G. Branden Robinson <g.branden.robinson@gmail.com>
 
 	[man, mdoc]: Regression-test special case of continuous
diff --git a/tmac/an.tmac b/tmac/an.tmac
index 3a38e1582..401ab45a7 100644
--- a/tmac/an.tmac
+++ b/tmac/an.tmac
@@ -111,7 +111,14 @@
 .de1 an-end
 .  if !r an-TH-was-called .return
 .  if \\n[cR] \{\
-.    fl
+.    \" We might have a pending output line that is not yet broken, and
+.    \" also be 1v from the bottom of the page.  If we break (or flush)
+.    \" the output line now, the page will get ejected afterward and
+.    \" troff will exit because we're in an end-of-input macro--our
+.    \" footer will never be output.  So, if that is the case, further
+.    \" extend the page length by 1v.
+.    if ((\\n[.p] - \\n[nl]) <= \\n[.V]) .pl +1v
+.    br
 .    pl +1v
 .    sp 1v
 .    an-footer
diff --git a/tmac/mdoc/doc-common b/tmac/mdoc/doc-common
index 3fe7ded24..b087d6308 100644
--- a/tmac/mdoc/doc-common
+++ b/tmac/mdoc/doc-common
@@ -1110,34 +1110,32 @@
 .\" NS modifies:
 .\" NS   doc-is-first-page-of-document
 .
-.eo
 .de doc-end-macro
-.  \" We may still have a partial line in the environment.  If this is
-.  \" the case, and we happen to be on the last line of the page, the
-.  \" '.fl' request will cause the page to be ejected and troff will
-.  \" immediately exit.  If we are in nroff mode, this would be
-.  \" unfortunate, since we would never get a chance to output the
-.  \" footer.  So we fudge the page length to make sure that the last
-.  \" page is never ejected until we want it to be.
-.
-.  fl
 .  doc-check-depth
 .
-.  if \n[cR] \{\
+.  if \\n[cR] \{\
+.    \" We might have a pending output line that is not yet broken, and
+.    \" also be 1v from the bottom of the page.  If we break (or flush)
+.    \" the output line now, the page will get ejected afterward and
+.    \" troff will exit because we're in an end-of-input macro--our
+.    \" footer will never be output.  So, if that is the case, further
+.    \" extend the page length by 1v.
+.    if ((\\n[.p] - \\n[nl]) <= \\n[.V]) .pl +1v
+.    br
 .    pl +1v
 .    sp 1v
 .    doc-footer
 .    \" If we're processing multiple documents and have started a new
 .    \" one, draw a line between this footer and the next header.
-.    if !'\n[.F]'' \{\
+.    if !'\\n[.F]'' \{\
 .      pl +1v
 .      nf
 .      ti 0
-\D'l \n[doc-line-length]u 0'
+\D'l \\n[doc-line-length]u 0'
 .      fi
 .    \}
 .    \" suppress empty lines after the footer
-.    pl \n[nl]u
+.    pl \\n[nl]u
 .  \}
 .  ch doc-header
 .  bp
@@ -1151,7 +1149,6 @@
 .  ds doc-operating-system \" empty
 .  ds doc-topic-name \" empty
 ..
-.ec
 .
 .
 .\" NS doc-paragraph macro