Re: [NTG-context] [solved] Regression: A^\prime causes `Missing { inserted ...`

24 Nov 2011


      Am Donnerstag, den 24.11.2011, 15:59 +0100 schrieb Hans Hagen:
...
On 24-11-2011 11:46, Paul Menzel wrote:
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...
having upgraded
ConTeXt  ver: 2011.10.14 22:47 MKIV  fmt: 2011.10.15  int: english/english.
to
ConTeXt  ver: 2011.11.23 18:58 MKIV  fmt: 2011.11.24  int: english/english
With
\starttext
         	\placeformula
         	\startformula
         		A^\prime
         	\stopformula
         \stoptext
I get the following error.
fonts>  fallback modern rm 12pt is loaded
         ! Missing { inserted.
system>  tex>  error on line 4 in file exponent-regression..tex: Missing { inserted ...
1     \starttext
         2     	\placeformula
         3     	\startformula
         4>>   		A^\prime
         5     	\stopformula
         6     \stoptext
         7
<to be read again>
                            ^
         \prime ...char \textfont \zerocount "FE325\relax ^
                                                           \bgroup \expandafter \dodo...
         l.4 		A^\prime
?
As a workaround `A^{\prime}` can be used.
Forget about superscripting prime .. that's a traditional tex thing as 
in cm/lm fonts the prime is so big that it has to be (super)scripted to 
look okay.
The prime in unicode is a normal one so that's what we now support, also 
for the lm fonts. Just compare:
\startformula
     A\prime
     \hbox spread 1em{\hss or\hss}
     A^{\prime}
     \hbox spread 1em{\hss or\hss}
     A'
\stopformula
Keep in mind that most users expect ' to be a prime.
Interesting. Thank you for the clarification. I will use A' from now on
I guess.


Thanks,

Paul