Small fixes (-P -e and image), eqn mentioned in the readme.

Makefile.in

@@ -53,7 +53,8 @@ REFER = refer $(REFER_OPTS)
 # -U     => unsafe (because of PDF inclusion)
 # -Tpdf  => output device is PDF
 # -mspdf => include PDF (so, images converted in PDF) in the document
-GROFF_OPTS ?= -ms -t -Tpdf -U -mspdf -mpdfmark -M ~/
+# -P -e  => provide "-e" to gropdf to embed fonts
+GROFF_OPTS ?= -ms -t -Tpdf -U -mspdf -mpdfmark -M ~/ -P -e
 GROFF = groff $(GROFF_OPTS)
 
 $(SRC).pdf:

README.md

@@ -4,6 +4,7 @@ This repository is an introduction to the good old tools to produce documents:
 
 - `roff` as the language to describe documents (`groff` is the implementation)
 - `tbl` and **hdtbl** for tables
+- `eqn` for math equations
 - `pic` for drawing images
 - `grap` for drawing graphs
 - `refer` for handling references and bibliography
@@ -21,7 +22,12 @@ Furthermore, this repository includes:
 
 https://t.karchnu.fr/doc/grofftut.pdf
 
+(Read this document on a PDF viewer, not directly in your browser!)
+
 # Limitations
 
 Images are poorly handled, and they aren't easily managed with `roff` by default.
 Some macros exist to do it properly, but it still is to include in custom macros then to document.
+
+Browser preview is ugly as fuck.
+It may have something to do with font embedding, I have to investigate, but right now you just can't have a nice preview on a browser.

grofftut.ms

@@ -482,9 +482,12 @@ Only PDF can be included, so images need to be converted beforehand.
 .METAINFO2
 .
 .nr figurespace 15
-.sp \n[figurespace]
+.\" KS and KE: keep different stuff together (no page break)
+.KS
 .PDFPIC -R "./are-you.pdf" 3.2
-.sv \n[figurespace]
+.sp \n[figurespace]
+.KE
+.\".sv \n[figurespace]
 
 .METAINFO1
 Note: for now, on my system, I need a hack.