Add all rendered symbols used by eqn. I use the Second-Edition User's

Manual (1978) for this, so it should catch most of them.  They just map
into the mandoc_char escaped characters.

1 files changed, 13 insertions, 5 deletions

diff --git a/eqn.7 b/eqn.7
index d7aa3c21..cbb4a4ef 100644
--- a/eqn.7
+++ b/eqn.7
@@ -89,11 +89,19 @@ non-empty quoted string.
 Unless within a quoted string, white-space (and enclosing literal quote
 pairs) is thrown away.
 Quoted strings are not scanned for replacement definitions.
-The following text tokens are translated into an acceptable front-end
-format, if available: alpha, beta, chi, delta, epsilon, eta, gamma,
-iota, kappa, lambda, mu, nu, omega, omicron, phi, pi, psi, rho, sigma,
-tau, theta, upsilon, xi, zeta, DELTA, GAMMA, LAMBDA, OMEGA, PHI, PI,
-PSI, SIGMA, THETA, UPSILON, and XI.
+.Pp
+The following TEXT terms are translated into a rendered glyph, if
+available: alpha, beta, chi, delta, epsilon, eta, gamma, iota, kappa,
+lambda, mu, nu, omega, omicron, phi, pi, psi, rho, sigma, tau, theta,
+upsilon, xi, zeta, DELTA, GAMMA, LAMBDA, OMEGA, PHI, PI, PSI, SIGMA,
+THETA, UPSILON, XI, inter (intersection), union (union), prod (product),
+int (integral), sum (summation), grad (gradient), del (vector
+differential), times (multiply), cdot (centre-dot), nothing (zero-width
+space), approx (approximately equals), prime (prime), half (one-half),
+partial (partial differential), inf (infinity), >> (much greater), <<
+(much less), \-> (left arrow), <\- (right arrow), += (plus-minus), !=
+(not equal), == (equivalence), <= (less-than-equal), and >=
+(more-than-equal).
 .Pp
 The following control statements are available:
 .Bl -tag -width Ds